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Diffstat (limited to 'README.md')
| -rw-r--r-- | README.md | 24 |
1 files changed, 24 insertions, 0 deletions
@@ -254,6 +254,29 @@ to produce broken binaries with missing relocations; it is therefore currently recommended that this combination be avoided or *FW_PIC=n* be used to disable building OpenSBI as a position-independent binary. +Building with timestamp and compiler info +----------------------------------------- + +When doing development, we may want to know the build time and compiler info +for debug purpose. OpenSBI can also be built with timestamp and compiler info. +To build with those info and print it out at boot time, we can just simply add +`BUILD_INFO=y`, like: +``` +make BUILD_INFO=y +``` + +But if you have used `BUILD_INFO=y`, and want to switch back to `BUILD_INFO=n`, +you must do +``` +make clean +``` +before the next build. + +NOTE: Using `BUILD_INFO=y` without specifying SOURCE_DATE_EPOCH will violate +[reproducible builds]. This definition is ONLY for development and debug +purpose, and should NOT be used in a product which follows "reproducible +builds". + Contributing to OpenSBI ----------------------- @@ -336,3 +359,4 @@ make I=<install_directory> install_docs [Doxygen manual]: http://www.doxygen.nl/manual/index.html [Kendryte standalone SDK]: https://github.com/kendryte/kendryte-standalone-sdk [third party notices]: ThirdPartyNotices.md +[reproducible builds]: https://reproducible-builds.org |